Multiple choice

A solution of water and salt contains 8% salt. When 25 litre water is evaporated percentage of salt in solution becomes 12%. Find the initial quantity of mixture.

  1. 60 litre

  2. 75 litre

  3. 80 litre

  4. 100 litre

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let the initial quantity be x litres. Salt remains constant at 0.08x while total volume becomes (x-25) after evaporation. Setting 0.08x/(x-25) = 12% gives x = 75 litres. Option C (80) would result in 11.4% salt concentration, not 12%.

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